9-5 Area of Circles

What does AREA mean?

• the distance around a shape

• half the distance around a shape

• the amount of space outside a shape

• the amount of space inside a shape

12 inches in this circle represents its

• radius

• diameter

Select the correct formula for finding the Area of a Circle. (a)  

• l x w

When finding area of a circle, if the diameter is given, we will need to find the radius. We can find the radius by _ the diameter by 2. (a)  

• Dividing
• Adding
• Subtracting
• Multiplying

Find the area. Make sure you use the diameter to find the radius.

Find the area. Make sure you use the diameter to find the radius.

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's area? Use the diameter which is given to find the radius.

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 28.26 m²